下列各句中，没有语病的一句是（ ）

John is very __________. －if he promises to do something he’ll do it.

youspend a lot of time looking for the lost child—________. It took us half a month, butluckily we found him.

I________a training course in Hangzhou to study English in the coming summer vacation.[ ]

The teacher frowned ___ annoyance when a studentfell asleep during his lesson.